Standing weatherproof seam for roofing-felt.



H. VON UFFEL.

STANDING WEATHERPROOF sEAM FOR RooFING FELT.

APPLICATION FILED APR. 8, |914.

I/I//T/I/ESSES HERMAN von UFFn-L, orr PHILADELPHIA, .'PENNsYLvANIA.

v srannrne'wnarnnnraoor sn FonnoorrNG-Fnm'. p

To'all 'whom it may concern:

a; citizen ofthe United States, and a resident of Philadelphia, in the county of Philadel-` phia and State of Pennsylvania, have 1nvented a Anew and Im roved Standing Weatherproofl Seam for which the following is a full, clear, and exact description.

` `T his invention-relates to roof coverings and has to domore particularly with seams.

o'r joints between strips of feltor rubber roofing. 1

, The general objects'of the inventionare to improve afconstruction of jointsoi seamsl of the character referred tok so as to be reliable and efficient inuse, comparatively 1nexpensive to make and so-designed as to provide for the expansion and contraction of the roofing strips and prevent buckling or wrinkling and at the same time secure weatherproofne'ss at the seam without the need of cement as is commonly necessary and render the roofing more attractive in appearance. D 1 More specifically the'invention has for its object to provide a lstanding seam which' is weatherproof and allows the strips to eX- pand and contract under temperature changes, such seam consisting offa bar which is nailed or otherwise secured to the roof where the seam is to occur-.and over which adjacent edges of contiguous roofing strips are lapped and conformed approximately thereto, and a channel-shaped. cap strip or .bar is then placed over the lapped edges so as to insure weatherproofness and attractiveness in appearance, the strips of roofing being bent up along the sides ofthe bar-so thatfat the bends space is provided for the lateral expansion and contraction'. of the roofing strips. Q With such which Ywill appear as the description proceeds, the invention comprises lvarious novel features of constructionl and arrangement of -parts which will be set forth with par` ticularity in the following description and' claims appended hereto.

In the accompanying drawing, whchillus; trates one embodiment of the invention, andwherein similar characters of reference indicate corresponding parts in all the views, l Figure 1 is a fragmentary viewof a roof' oofing :Felt, of.

objects in view, and othersl ,l Specication of Letters Patent.v Patented July 20, 1915' Application ined April s, i914. serial No. sso,3eG. V i

e having the improved covering applied therer. Be it known that I, HERMAN von Ultram to; Eig. 2 is ak sectional yperspective view showing the manner of constructing the s'eam;Fig'. 3 is a' transverse section `on the line 3-3 Fig. 1; and Fig.. 4.- is a sectional viewof a modified form of the invention; j

Referring tothe drawing, A'designates i the roof ofa building or any other surface:

that is to be covered by a felt or rubber comosition roofing B, such roofing being made into strips l, 2, 3 that are laid flat on a roof# l.ing A, preferably lengthwise -of the slope thereof. The joints C between the adjacent edges of contiguous strips of a roofing are so designed as to provide for the expansion and contraction of the roolin Astrips while reventing wrinkling or buc ling thereof. lach seam. or-joint includes a yrail or bar 4: made of wood or other suitable. materialand secured to the roof A by nails 5 or equiva-` lent fasten'ings. The bar 4 has a rounded head 6, a reduced web portion 7, and a base,`

8, somewhat likethe cross-sectional shape of a railroad rail. In other words, the bar 4 has on its opposite sides longitudinal grooves 9 toprovide for-the expansion and contraction of the roofing felt. The edges 10 and 11 of contiguous strips of felting'wmaterial are ybent upwardly along opposite sides .of the bar 4: and lapped over the head 6 thereof, as clearly shown in Fig. 3, and over lthese lapped edges V10` and 11 is placed a channel-shaped cap bar 12, whereby a water tight joint is formed withoutl cement or waterproof compound, otherwise necessary.

In laying the covering B a bar 4' is first fastened to the roof in the desired position and the strip 1 of felting material is placed on the roof A with the edge 10 bent upwardly as shown in Fig. 2 along the leftl as, for instance, by nails 14. The edges 15 of the side members of the cap bar do notv extend any lower than' the bottom of the headl 6, so that there is considerable space 12 is placed over the overlapping edges with the head portion of the bar 2 fitting in the -channell' of this cap bar. The cap bar may v besecured in place in any suitable manner,

between the cap bar and the roof to provide for expansion and contraction of the roofing material, the latter being free to moveA at the bend 16 as the changes in temperature cause this expansion and contraction. It will be observed that the bends 16 of the roofing material rest on the laterally curved portions of the base 8, so that there is no l the base 8 and is always supportedv by such side portions.

In the modification shown in Fig. 4: the

memes claim as newl and desire to secure by Letters Patent:

1. The combination 0f a roof, liber roof covering strips thereon and an expansible f=eam between lthe adjacent edges of the strips, said -seam comprising a bar fastened thereto and having a'rounded head, a web narrower than the head and a base wider than the web and formed with curved side surfaces, the roong strips beingV laid on the roof at opposite sides of the bar and bent upwardly along the sides of the bar and lapping the top thereof, said roong strips being in Contact with the head and the curved side surfaces of the bar, and means for fastening the marginal edges of the roofing strips tothe top of the bar.

\ 2. The combination of a roof, ber roof covering strips thereon and an expansible cap bar 12a is shown as made of sheet metal seam between the adjacent edges of the of U-shaped cross-sectiom'and the side mem/f' bers or flanges thereof: are formed into internal rolls or beads 17 which serve the oppositesides of the seam. Thelmetal/ .cap bar 128L is seeuredin position bynails or equivalent fasteners and thejside 'portions thereof are resilient so as to yield 'under lthe construction of the roofing. strips". n l

As shown in Fig.v v1, the bars 4 extendk transversely to the looardsfufl of the roof A,

'the roong strips'of course' also extend transversely of the roof boards, but it will- -be observed that roofing strips of felt are I not .tacked to the roo'board but are clamped and held fast between the bars 4c andv cap bars 12. The advantage of this is that as the roof boards shrink, the roong strips do not wrinkle' or buckle as is the case where the roofing strips are tacked directlyto the roof cards. f

Having t0 grip' -am v described y'my inventan, i

surfaces, the roofing strips being laid on the roof at opposite sides of the bar and bent upwardly along the sides of the bar and lapping the top thereof, said rooing strips being in contactwith the head and the curved side surfaces "of the loar, and a cap piece fitting over the top of the barand holding the marginal edges of the said strips clamped betweenthe cap piece and bar. v

ln testimony whereof I have .signed my name to this specification in the presence of two subscribing witnesses.

. y nnnMaNvoe miran Witnesses:

C, BBADWAY, n

' 'l Pnmne 1) Romea 

